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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65f09595067a294e87c777d05db399984c6ea58f18d330ab20bbbca298a04b8e' 
  AND token = 'vdqkmWPMrtkcPae0cDQaZ7XqUQ661vZ0m3w5OgnMt78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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