Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab6024b733d55b91146102ea8d05c3d299ddf4ea8244e2c6ddbe0e22dbc9ac60' 
  AND token = 'W1AbkGgeMEoI01GGAw3E/BpvsnrMGmT2kGRPlVdsqr0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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