SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bbaad63ed29b17d83abf3be8e9d17f29a905feb484f8b77cf6b0f07e8c465eea' 
  AND token = '3d+phuBzj/0Pv57/o9iKTgBKGhjgMi6ME2LfQvLtltU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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