Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9a9e87dac83ba762de760112ada112704878808e8335dd8e1f9a6459142880f7' 
  AND token = '01IJCeKC4DDHRj6ffPSAi1tEpZ0YDZ4cgsBORsVYtAI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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