Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a8af828afa6dd74b213d147ddc9b88a7ce78f0f6844cd9aa2da76027a1139e3' 
  AND token = 'aGsYY9NXgWRvhvg1MX8Beu337YRHAJNPhep70rpjxlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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