Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7d19375aa0ec62c1bce167014a014e96972249956f04d13fec1aa1d07be2c66' 
  AND token = 'U55YCbbWzWpLYZ3ImtTxydnk2x0MNUL98KCs/0bpCQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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