Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c665074d75d5a9fcc55fdf50768d5804e6925a0956810aa945e27eff1fc3ea' 
  AND token = 'a4PUEdABL9iTRRZdDNTr94dnfLD8dfO722QFi04kIdU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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