Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85b484abe51147513aa23dc7091b91f5b9b1d9950a0a071a35373aad6daf4552' 
  AND token = 'sBJaVsrInA6pdEw9OnHNGRlouHXNHZWYU2WMVPdcHyk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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