Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '249d49c29432644f41f6489c6e65ebb19b35004d445609720fb0632fe68427f5' 
  AND token = 'frH8SpN8P66f9CozIyMOClY0duip9fuzdDTuKwgNX6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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