Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5b2ff1a52c08901d034297300f0bf8a98ec0a912cf49f8d5f5e4d318a9e3464' 
  AND token = '1bAOvbLQ+lebZpna7L5eSkP8ZTIE7/9ac8MJSvqDGS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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