Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2e131b4738d9b1897d7a2caf8a0dc6563affa55a67e49eecdd6932bd410765c' 
  AND token = 'HC0g5HaKRYb22sHByDZbEdLXBrbfV5maLpsIZt3E/yI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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