Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a06bb9960df81836c5f47984ee7377a174439f4a4c21413f802c08dc4635ad3c' 
  AND token = 'EfT+MTVdIue2gmrqB0+07DWc8AtlwB6PC2T2wVk6W9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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