Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26f7d969e5df73770779ca5aaa10f764940b2128e9175f203643c2c5ddb206d3' 
  AND token = 'CHh6h0CPxbYXI9v12fjkjxQ2Ya/zreCQdlfhxudYal8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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