Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '211f66b354bdd3cc4415e686487c66606895d213cfeacbd8795854b9039e8b3b' 
  AND token = 'hvpiQ3R0FR6ytk4M6tMTxLPnCSqlMMcvmg1H4CMDBJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}