Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a8d4c98107376c29a006acf169b7cea92799a56e0fc23321366d622c20e69c0f' 
  AND token = 'QOEcGWKZw6xeJFilfTdVIN5DmpkRw0/rkUXfwYrUxgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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