Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '991a3dacb7dc73c456f3c4d1b989554e8b70af1e0ad4d680627a5f7f746d7cba' 
  AND token = 'KN9U9L5wcuMciDBUc2mzBaDel9rT532odQKHyyNa0xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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