Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba759f14d9bb7d883490bc6bb4fbb1775c62decd64bdf8f071a0d6f428ab498e' 
  AND token = '2WTbkgeg2NlspOavtx+JZJwf/BA1NAHh8ZlKXRQ/4XM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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