Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd52691918a052b096869af679b9952992d90e0b2352b9dc6a018cd957fdc49f0' 
  AND token = 'iDaX28YERnvgWcQOU6R/POzErP9x3QCh68msRowSdYM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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