Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fea518c34bee0b47924c667d6a390d481cf14d70c3c5edc17c08f882df81747e' 
  AND token = 'LDkSMmhKE7Ss2APuVrpZEE2W0bZ84LEb3wfXXOA7t6k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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