Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a89015f7eefda079fbc9c8db83f51d202546dc47d3a387cb04336371b7874a4' 
  AND token = 'UcdNKmZVTjg8PNBo8BIU+EhrYPcPLUeRft+4QZIFL3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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