Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1d65c7dfced0d6a528ffdbfe3111633544cab6201294e1fc13d5bf60666e96d' 
  AND token = 'Q5Zc+7Bce6ZeSbq+p/0M3a0A3TegFKB1jXLjRltJnlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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