Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4559a51759311d66077f73b1ab18d44cd8a70719fae55343f56b021b2cac62d0' 
  AND token = 'hTP4lKSEIZpWE0YDlHd0ubnm4Wr+bvJ10/yTWtMJadM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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