Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5dee3622a2849615d92d5e0fbe67681dde1f77264dc81917aa3296ec7fc09e3e' 
  AND token = 'XGHYkZ6c8Trq+6Pumt/b6fY552SfySlSVDb1ZIt9HLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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