Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7a9f535c152afb3d82be38fab5f09b73f60da6cc098b8f401a2430c5a5f52b8' 
  AND token = 'N1dgIqLeMmf61Tr9ve9U7tXlT/Gknj6JovLqYgI1eBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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