SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00caa9836347a1d26f710065afab755ec13693f1732b9bac173b8c18fb23e8c8' 
  AND token = 'Oo3Q81OqwesLwgURVSqumtc5svlhjZMUPPNRZFK8xNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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