Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c3df12ce3bb52b5478ff700b6fa9375d78e0674f73aca7301a1c7f1b268c7f8' 
  AND token = 'J8vgzMNBXii4ye0/E0lRT4UeMM+jvEqvRFphJU9+cUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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