Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daa5467e6a3093a49270f11bb4b51cd50092da9cf73091cf4cc491883e13d9f5' 
  AND token = 'S0yyvo4EEYye9CpkyZusyLTnxqEStEjwYOAijZ5Y62s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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