Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6be59c6bf1cd448be1f91252187459d50f491f45b87405d97848174e5feff970' 
  AND token = 'Xl4zq59K1bdcVdTCbS+64bWE49S95RkecGb0OjzlTNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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