Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79600c79ea7fdbc9d82423c17afb0f6363f99e8dff7f2688f463ae6794b029b4' 
  AND token = '47gtezWOzR2pGNc+Pn2LPjf7vgiLNVJaLhGeT8yKxec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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