Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79b5e0aafb4ef23597d25256f7b7d9e663bc2ebfd959caed66999258eed1ade6' 
  AND token = 'twXp98DeI6zxYsO0gkFzTsdW35EbxlVdOvLU3ic1o1o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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