Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a35b58291e6556ed7c22be95c09763206f899d248e34499631e6aa043328e48' 
  AND token = 'UkmolAfN/aRbYc/PdTty50u+03gaikDW+UjAuPSbZh4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}