Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8215fd94053348ebb638fe8bfee5ddbb0ccae7f7c68e8dcac1a5e24d04fa042a' 
  AND token = 'ZCmETkafA/crW99RIlt/ZO3FODjfrHLKUbMmHEmYq9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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