Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b3391a7c144c58bfe63bc68313ea89e416e7424291701d967d426a60cc085c83' 
  AND token = '2SnqLv1KXT7mNIpyp7y0QBtQmUs5ljmkKx7LletoWtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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