Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9651d835e003ed355660dcef0296b3934da44ce23d9543897a908f71d31b7276' 
  AND token = 'B3viDquLp/rbxjC4aIRO8xG/h5cmV1bTvdcTd+shRtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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