Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66587b2e3f014b126afd799ad3792de00e04efd20a052bb41bf388406e285295' 
  AND token = 'OqQbr2qTf/6pBNQhpt47cDb9L0Ola+UoHUIpAszvoxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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