Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '506bc60ea12eeb10aca96f8495b72b36253049c9a12a8f23612bd7d7542e84ae' 
  AND token = 'X71yyZfcMeFuHE9FvachRzScaZFIHO/ap1I3boYrzEw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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