Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7d5899edfe71e9f833a8bdea73930e01dbaee849a5af549ab1f28c8abadc1daf' 
  AND token = 'Mv8D8/drWDRcSOWgl+7YNFrYIF2Nh55599YPBgZSFZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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