Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7489cb320dc8f2dc50bc9ea4b759f42a09e9ee9bb60c47b964b990e37ee86768' 
  AND token = 'cHZBPGPXtBYB7vpgdew3heNAguAXXXzeFbVWSvbM/Hc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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