Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57eb6fb536b52560076fa1c9e665ff89511c9da4ad657a554e1ed3c0cb4ca26c' 
  AND token = 'SGCGYUWBdeMGQNpT1Jwx9CK8hGzHovzZAQx1OL5lDRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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