Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2e0ada38fb2a7d318932b08fbe6afdc22ff31b5cb108069f3616586619ed5e' 
  AND token = '9O/Omm+f46pdBXXc5gTBaycOaMHyIzL8L7Fpk9jZ8uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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