SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1196c030c3f4059f6852be7285ae6279872353692241e635be1e60b33d8b747e' 
  AND token = 'ygK9E5GoW0635v4hTr6/KVnPsE2JSFCfJmRPHwS+cKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}