Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '572a8034f21f547d8e40d0837be4ec35457f8ee8ca9cc3916ab6de70ee7e3d5f' 
  AND token = 'aJQwDy5NAlUVNXa+A0QHI9yavvgrbg7yUFDtbLzZ4tE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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