Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba5d502cd3e336907a6b28305eac552418ee679313540d518ec8591e10ee0fe3' 
  AND token = 'lqWYskK8ZOH/ceI5aBb4CLWwQqqyyhA7ayUfSby8eC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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