Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a1de73cfadf85c1e0001d7ec37fc3ba0cf84814adfcf76900b78cfc179cdd426' 
  AND token = 'c4EelecqHPFRy0Kn99CCCEummNtQpKcGwryPkgT5lUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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