Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'f17e5d59934771d3a16923220ebdf0eac2f2687e1879c53db4155f5280730b08' 
  AND token = 'uyeedbn2L5LVq73t01ngXjLRgFijT2PE34zTv+MIRQQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}