Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c7094bcc126ee00a523c656f65f73cef3d1929743cbd896989bcaee0d914b9a6' 
  AND token = '5WKRfvzSIHzy6xvoxIYLz4Gql4n28uz+zf4lhZnqANk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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