Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edabfbdf1f5b1c2fca14ebdbbf0516fd339c519bc090310017746d7645a589d8' 
  AND token = 'Plos56xJVl2cveKBbSTExZrfs4kRxisyGIjOnJlYVGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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