Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c181397c72f6e2ee55a5a7c377aa454edea1b22dfebcb389194e3d0143466a14' 
  AND token = 'mAMzOb1wBFF0dRvc1rXqKLJcBIOHSb+wlBWCbXTuqC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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