Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b4d56e26a4dd348b01553d5fbce37fb694e2d1ac8199d65ae83c6c82eb5901ea' 
  AND token = 'JVGnU+2qlyGbUS+3pnEjOrSuaK+VieJAqSkcjoeaB+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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