Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93af160113aaec47e34ffbcb967abb220ccf69b40656a0d9464ce74ba67bc394' 
  AND token = 'OXRFcvsGB9itwHmn/Iu2c+3Hm633L5R9+/w7Lfpt74g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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