Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '167002d0189b57500efaf061d2b67c613f11c126a4ec359cf1d4f64c8ef7bad1' 
  AND token = 'jzQ/AIUJ3CYxtta+t2FePIK5ygxwQ5yZuLD5qKTqeEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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