Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3ea7b1fba8ccd3139aed52194aad4536ecccea3414e1e130af3ed2cddbf10ebd' 
  AND token = 'aNDdyxEfKAhZVaGiQ5vL2TvHLpwGftR3AOYHbJEf3Vo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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