Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c5b7b26b1c8399b52b38fb79c6df0c2235695c8e09143a73f4ddb9f45ef6d2a' 
  AND token = '030cb6WmK1Y7/8ooGUMMlL1jdJaND8bEZigPH6fFSZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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