Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28496836c8b0ba8f54e7790188bf4caa63cf157ab1bb3a19bbc3eeccbe2576e8' 
  AND token = '1HC3EmIFVX9BsPkZwMtFSANXvUbDMcO0OF8+hL6jXaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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