Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1486e7b716b72d4aa9c5d198fee084f805e1a68dad4f1cb69742a3f8984d890f' 
  AND token = 'm0G2vkQjm5aIh/QPU+YaKt/nIeYTAAi5ad4Nz98yAMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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