Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7363ab2a697a81b49d538d5d8b72c8b00bda957f2de4395d9d62de353c7975c0' 
  AND token = 'gKBAQOyiKF7alHEaTobE8wSGXV3qu2XPCVOTbX869Kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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