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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fc7d13ce0e1de252910540fc91024508f2388d71186c251b217e9f00179200e0' 
  AND token = 'ja3agBo9srjHns+zw09/jt7mV4y9PVJuo6XWEDkNNVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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