Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a305f1637f44c860e5cd5e7710edba5544009ac979397dfd553f733f8f5e58a' 
  AND token = 'u3Xi8ChEgLUKz/V++h2gAZzGnPO3heXutbOEaQ5+4wA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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