Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c6e0b134563f2f7bfff27fb689476c2dfa8e9400251f2f484e6f3358f462333' 
  AND token = 'VcKWO72UacuSzvuudWjTTjfl3hltq7zZY3odWbHe6bw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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