Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ced53e1c77c24e1beecbd461160eed8b734152b5243f6ec205dfe3307f682a75' 
  AND token = 'VJUg2mT15DGJJiBLhJBlEb3hxuDSnEjvhutbA8j++zw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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