Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b66c5c5350f3e2a3026292e9a30f75a9b41497ce7efbbbc7e6f474e101f4d4a' 
  AND token = 'Hua1+iKGtIzMkdxiI19DBL4ktxOHaS8UwF7wbH0ibhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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