Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8749810cf8645c878c06ce6b58b1408a008e71b12e85aab4972d7b96ec9c082e' 
  AND token = 'UkwCt9lm95CLaCORH1hTBnbV6U+fPvpxH98FV2vqIOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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