Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dab9fef5efd7781fe65e668cbd300001a3ee7f7965da8a18ac94dad7af8a35b' 
  AND token = 'xAyrR1WLvS299drQNYKbDLiLrbAqc+/8JxBdJXQRh1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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