Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e01a37982ab17ecf033173d8382fa8d609d5f6e6adcd8c07c4c6fb39db8f483' 
  AND token = 'hazPCtQe4bcGkwVuUV0sMaOPMvum0T/QI+FBbE4eCfo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}