Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b738716dcbad01ec1deb94b4d3b9304780822ebc77a01d067157de0574d06864' 
  AND token = '+/MERUeOk8NO9j3DUU8J9eMw1HdvCTxczZEtNeF4X5Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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