Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a63e27cb780dbbb43fba20151cf72d709b54867e17347969659803275fd71c03' 
  AND token = '2o5/YgIjsAkjZmbzdMdamQtSKKFQu0qHgDNxRMjA5Zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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