Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '52e736dba2495f83c2d6248d9ff573059bb69d08ba5040f57f77de02bea0eb55' 
  AND token = 't7KiJttX+30Rx7tWyz2KJCjDTmMC00qMeAcEVZ9xEg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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