Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9afa9ad9033fd9acdf79bb9619ea566fee5bbec4439387c2c19042c628cb62d7' 
  AND token = 'CrMydHYmtDAxwVNCqKKjdR171IXI0AXHttWBj17nNdM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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