Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b57000bafbc007a9e6597380a455e64bd3b9c5c13ae70d574a9a2b7732a8b582' 
  AND token = 'ArbOVaFtkjcca0DFbAUU1+we3sH3xRdACf+AtG9/pzQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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