Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bf7e1eab702b03928518adb0e1c7dddea18d831757f52619481b4c0708f63c6' 
  AND token = 'LiM/Z0kRFGOczVmWF9JvcthXKW9uDEkO7HckEkxLyJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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