Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2be72d5713c481111633c58c39031c843dcc588cd65f20eb55e9420d49ab999c' 
  AND token = '12zJ0/l6mAlTu839thBWIYx8T1KUKHfxcTN/5gvI8+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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