Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f918ac4868dd47b3b98694678a8ebbdcd2dde8eec3c23b7a56c623f57c950888' 
  AND token = 'xormx0eZgfZJ0JQvqVZ4ikzGosuqYk9m9VhdTwkr5bk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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