Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b6b3ce68b119f3812d704465865f9cddea245f218694d756edbabfd4fca3e7a9' 
  AND token = 'ECKIYD3yk7aLk8Hvr66ahuuJbLhspQFavPLaY89CG8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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