Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78d0dafd13ec7af95598cd7ea48bfe3cb6e7f19b51f6a1c2cb84cdb12b0b157f' 
  AND token = 'bReuCRhfq8d66VM/IbGIfiMf78s9E3pzbYhj+DJajWo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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