Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21bae514d40f0862fa8ddaf81de06a9c169035731f4a92145a2d0743f7663075' 
  AND token = 'eq/++ks20S/DiYBEM4zpKTL/8ACnx2F8txxM7aMK6ow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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