Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4dabb12749f46149b917b685e1a0ef40985e2836f490a5f21e292f311e8720e8' 
  AND token = '1i4+gnS0zRqmHdDr1Bq0kDM7maCObBm0xxrnGG0Q5dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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