Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb4e61cf22e6d32fed5a81295ba6e487dbc7e286afa1c533e6dddbca99d824d7' 
  AND token = 'L4J7tElxplMsgDKURWcOqWsR6rySUZFCS1qAahgjthM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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