Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e17cc869ec71961268f569bfb775872b3601df9379805130eebd687f4ed6f8ac' 
  AND token = 's1EfzB0Q+lzwmRumdp1cEZOXkPJF0tMoBG/rJBz3Lic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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