Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '982fa8b07f9fdb944b0286c4b73075561f22b13e68707ddaa55143d340361114' 
  AND token = 'eLwl53GiFIkkOBzTkkx2EoPoouEsplWl9NH/UTUlMr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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