Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f3f8d01a85637b6813953d78e8a7303bf352cd607fc0820deef9d918412a908' 
  AND token = '/gsD91/4T27gJIYT1b0jCwNi3NO6sz8OJJoU1iyDG5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}