Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f0aa18fee4d0372aa69ec02d7c83a9ccb8a72c14051142c7736a4b8de41f6b5f' 
  AND token = 'i2K7POjrbpyRQuV55vmm7JBAxcKuCHs9T6QT31BHY7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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