Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2168b03d36e6e3a16964fdfe709d96166483a8229ace2c8f77ebc296a7f5da6' 
  AND token = 'L5agK5iqPNAALDLld/6C68F+oW7j9DKlAyTsIqbImXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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