Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f035f0d95513fd7ba1453cb7c7cfc681c6cfd4a2dca559d0eebfed81b361ba22' 
  AND token = 'knWD7DUBcKNZcitUidizUOVTNw7BStW2jtbzVedhTLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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