Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5ca7cb13a85f924f28f36fc6f2a027e32e1fc40a532413c9f0ea6ff7652074db' 
  AND token = 'MFg7cYKiwpoQGkLQckaChxnPrj9rkh65Ku+RRiM6AaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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