Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2c19faf73fd99eacfb65ad5a88360d9e0c772c9980663d7fbd512d6c8bc839d' 
  AND token = '7rt7nx/zGBkaVDM0+pbEKwYi+v5+G7WWMv5QCLhly3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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