Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3ef9e848fbcef845e03cb4af243589bd702ddf8093a0992e8f6375769f1b63a1' 
  AND token = 'dXG24KF02lZoCUhlaaMMVf97PVL4UhRiWJ0pXx4IAcw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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