Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96eb643660dd91e8d2f709bacf2f72d2cfc8fcea17fbd454b1d0b03113d7afd2' 
  AND token = '8p+RIGoT739RisQHZAb6TclRaDWZBjwokkynKMxU1kQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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