Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'dfbaf9d24d66e3dc9b9d12b3a867c0e1bef230bc43dc6e858f472217b792af8b' 
  AND token = 'X47iGQ0my7pdUffHJHrYI19k2SR9L4Si+iR1ecw7gTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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