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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a5c8f5313ca132834d105e6f0bdc3271420cd17847437209ae9d55e46c3ff93' 
  AND token = 'qXb+oNIMUao19R66gnzNbdj2OGeJ8dmSGAf3FblnI9o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}