Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfee138660590a3128366f8834fc4ba819ef8e07c3f11b2beec1e4557e80d5cf' 
  AND token = 'AlVpEcHnaLStg14twk4fiNnZgaMdKwm+c38H/xwLlpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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